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This implements execute-only support for ARM code generation, which prevents the compiler from generating data accesses to code sections. The following changes are involved: * Add the CodeGen option "-arm-execute-only" to the ARM code generator. * Add the clang flag "-mexecute-only" as well as the GCC-compatible alias "-mpure-code" to enable this option. * When enabled, literal pools are replaced with MOVW/MOVT instructions, with VMOV used in addition for floating-point literals. As the MOVT instruction is required, execute-only support is only available in Thumb mode for targets supporting ARMv8-M baseline or Thumb2. * Jump tables are placed in data sections when in execute-only mode. * The execute-only text section is assigned section ID 0, and is marked as unreadable with the SHF_ARM_PURECODE flag with symbol 'y'. This also overrides selection of ELF sections for globals. llvm-svn: 289784 |
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| .. | ||
| ARMAttributeParser.cpp | ||
| ARMAttributeParser.h | ||
| ARMEHABIPrinter.h | ||
| ARMWinEHPrinter.cpp | ||
| ARMWinEHPrinter.h | ||
| CMakeLists.txt | ||
| CodeView.h | ||
| COFFDumper.cpp | ||
| COFFImportDumper.cpp | ||
| ELFDumper.cpp | ||
| Error.cpp | ||
| Error.h | ||
| llvm-readobj.cpp | ||
| llvm-readobj.h | ||
| LLVMBuild.txt | ||
| MachODumper.cpp | ||
| ObjDumper.cpp | ||
| ObjDumper.h | ||
| StackMapPrinter.h | ||
| Win64EHDumper.cpp | ||
| Win64EHDumper.h | ||